Aphids

An ecological survey was done to investigate the co-occurrence of various insect predator and prey species. Here, we consider a subset of the data relating to one aphid species, the pea aphid, Acyrthosiphon pisum. In each of three fields, 15 randomly chosen triplets of adjacent bean plants were inspected and the number of pea aphids present on the three plants was recorded.

Usage

aphids

Format

A data frame with 45 rows and 4 variables: ID, Field, Sample, AphidCount.

ID

An ID number.

Field

The field number.

Sample

The sample number.

AphidCount

The count of aphids.

Source

Welham, S. J., Gezan, S. A., Clark, S. J., and Mead, A. (2015) Statistical Methods in Biology: Design and analysis of experiments and regression